Near optimum control of large scale systems: Synchronous turbo generator system as a case study

2007 ◽  
Author(s):  
S. E. Razavi ◽  
M. R. Jahedmotlagh ◽  
A. Shiri ◽  
H. Amin Elahi
Keyword(s):  
Large Scale ◽  
Optimum Control ◽  
Generator System ◽  
Large Scale Systems ◽  
Turbo Generator

Dynamic Meta-Learning for Failure Prediction in Large-Scale Systems: A Case Study

2008 ◽  
Author(s):  
Jiexing Gu ◽  
Ziming Zheng ◽  
Zhiling Lan ◽  
John White ◽  
Eva Hocks ◽  
...  
Keyword(s):  
Large Scale ◽  
Failure Prediction ◽  
Large Scale Systems ◽  
Meta Learning

Applying RCM in large scale systems: a case study with railway networks

2003 ◽  
Vol 82 (3) ◽  
pp. 257-273 ◽  
Author(s):  
Jesús Carretero ◽  
José M. Pérez ◽  
Félix Garcı́a-Carballeira ◽  
Alejandro Calderón ◽  
Javier Fernández ◽  
...  
Keyword(s):  
Large Scale ◽  
Large Scale Systems ◽  
Railway Networks

Modeling Queue Service System in Pedestrian Simulation

2011 ◽  
Vol 187 ◽  
pp. 1-6 ◽  
Author(s):  
De Wei Li ◽  
Bao Ming Han
Keyword(s):  
Large Scale ◽  
Service System ◽  
Safety Control ◽  
Large Scale Systems ◽  
Queue System ◽  
Proposed Model ◽  
Machine Layout ◽  
Pedestrian Simulation ◽  
Grid Based

Pedestrian simulation is widely used on the assessment of facility design and crowd safety control. It proposed a grid-based model of queue simulation system considering human physiology and psychology. Both logic queue system and animation queue system are modeled separately. Deadlock deal mechanism is designed. The proposed model established a good interface between the pedestrian behavior, queue system and animation. It can reproduce phenomenon like traffic shock wave effectively. A case study is shown by simulation of ticket vendor machine layout assessment in Beijing South Railway Station. It concluded that the model is effective and adapted to large scale systems.

Social movements thinking for managing change in large-scale systems

2020 ◽  
Vol 33 (5) ◽  
pp. 697-714
Author(s):  
Judith A. Holton
Keyword(s):  
Social Movements ◽  
Conceptual Framework ◽  
Large Scale ◽  
System Change ◽  
Status Quo ◽  
Content Type ◽  
Large Scale Systems ◽  
Large Scale System ◽  
The Status

PurposeThis study explores the efficacy of social movements thinking for mobilizing resources toward sustainable change in large-scale systems such as health and social services.Design/methodology/approachThe study proceeds from a critical realist perspective employing a qualitative multi-case study approach. Drawing on the tenets of grounded theory (i.e. constant comparative analysis and theoretical sampling), data from semi-structured interviews and field notes were analyzed to facilitate theoretical integration and elaboration.FindingsOne case study explores the emergence of social movements thinking in mobilizing a community to engage in sustainable system change. Data analysis revealed a three-stage conceptual framework whereby building momentum for change requires a fundamental shift in culture through openness and engagement to challenge the status quo by acknowledging not only the apparent problems to be addressed but also the residual apathy and cynicism holding the system captive to entrenched ideas and behaviors. By challenging the status quo, energy shifts and momentum builds as the community discovers shared values and goals. Achieving a culture shift of this magnitude requires leadership that is embedded within the community, with a personal commitment to that community and with the deep listening skills necessary to understand and engage the community and the wider system in moving forward into change. This emergent conceptual framework is then used to compare and discuss more intentional applications of social movements thinking for mobilizing resources for large-scale system change.Originality/valueThis study offers a three-stage conceptual framework for mobilizing community/system resources toward sustainable large-scale system change. The comparative application of this framework to more intentional applications of social movements thinking to planned change initiatives offers insights and lessons to be learned when large-scale systems attempt to apply such principles in redesigning health and social service systems.

scholarly journals Typical Daily Profiles, a novel approach for photovoltaics performance assessment: Case study on large-scale systems in Chile

Solar Energy ◽  
2021 ◽  
Vol 225 ◽  
pp. 357-374
Author(s):  
Julián Ascencio-Vásquez ◽  
Juan Carlos Osorio-Aravena ◽  
Kristijan Brecl ◽  
Emilio Muñoz-Cerón ◽  
Marko Topič
Keyword(s):  
Performance Assessment ◽  
Large Scale ◽  
Large Scale Systems ◽  
Novel Approach

SUPPORTING SOFTWARE UNDERSTANDING WITH AUTOMATED REQUIREMENTS TRACEABILITY

2005 ◽  
Vol 15 (05) ◽  
pp. 783-810 ◽  
Author(s):  
ALEXANDER EGYED ◽  
PAUL GRÜNBACHER
Keyword(s):  
Large Scale ◽  
Video On Demand ◽  
Requirements Traceability ◽  
Large Scale Systems ◽  
Software Application ◽  
Development Life Cycle ◽  
Software Understanding ◽  
Important Means ◽  
Stakeholder Requirements

Requirements traceability (RT) aims at defining and utilizing relationships between stakeholder requirements and artifacts produced during the software development life-cycle and provides an important means to foster software understanding. Although techniques for generating and validating traceability information are available, RT in practice often suffers from the enormous effort and complexity of creating and maintaining traces. This results in invalid or incomplete trace information which cannot support engineers in real-world problems. In this paper we present a tool-supported approach that requires the designer to specify some trace dependencies but eases trace acquisition by generating others automatically. We illustrate the approach using a video-on-demand system and show how the generated traces can be used in various engineering scenarios to improve software understanding. In a case study using an open source software application we demonstrate that the approach is capable of dealing with large-scale systems and delivers valid results.

scholarly journals Human Intervention and Interface Design in Automation Systems

2010 ◽  
Vol 6 (1) ◽  
pp. 166 ◽  
Author(s):  
Pere Ponsa ◽  
Ramón Vilanova ◽  
Beatriz Amante
Keyword(s):  
Flexible Manufacturing ◽  
Interface Design ◽  
Rational Design ◽  
Large Scale ◽  
Manufacturing System ◽  
Automation System ◽  
Large Scale Systems ◽  
Automation Systems ◽  
Operational Modes

Human-Machine-Interfaces are with no doubt one of the constitutive parts of an automation system. However, it is not till recently that they have received appropriate attention. It is because of a major concern about aspects related to maintenance, safety, achieve operator awareness, etc has been gained. Even there are in the market software solutions that allow for the design of efficient and complex interaction systems, it is not widespread the use of a rational design of the overall interface system, especially for large scale systems where the monitoring and supervision systems may include hundreds of interfacing screens. It is on this respect hat this communication provides an example of such development also by showing how to include the automation level operational modes into the interfacing system. Another important aspect is how the human operator can enter the control loop in different ways, and such interaction needs to be considered as an integral part of the automation procedure as well as the communication of the automation device.In this paper the application of design and operational modes guidelines in automation are presented inside an educational flexible manufacturing system case study.

Modeling of interconnected flat open-channel flow: application to inland navigation canals

2018 ◽  
pp. 87-95
Author(s):  
P. Segovia ◽  
L. Rajaoarisoa ◽  
F. Nejjari ◽  
V. Puig ◽  
E. Duviella
Keyword(s):  
General Model ◽  
Large Scale ◽  
Open Channel ◽  
Water Stream ◽  
Large Scale Systems ◽  
Inland Navigation ◽  
The North ◽  
Calibration Step ◽  
Water Depths

Inland navigation networks are composed of several artificial canals, usually characterized by no slope. These canals are large-scale systems that can be accurately described by means of the nonlinear Saint-Venant partial differential equations. However, the lack of an analytical solution for these equations is one of the reasons why simplified models have been developed. In this work, the Integrator-Delay-Zero model is used as the input-output model to link the water depths to the discharges. A modeling extension for a canal with inflows and outflows along the water stream is proposed: an overlapping problem is discussed and a criterion choice is defined in order to obtain the general model. With regard to this criterion, a calibration step is needed, both to overcome the natural limitations of the simplified model and to ensure the correct computation of the general model. The application of this modeling approach to a part of the inland navigation network in the north of France serves as the case study for this work.

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